Great post---all the input, code, and expected output. Thank you.
Something's wrong with the json, your program seems good. I looked up valid json examples on the good internet, then inserted outermost curly braces.

The key "group" appears three times in the json with values ['tag', 'url', 'title'] . You'll need to do some work to figure out why you don't want 'tag' in your output, to find the values associated with 'item', and how to convert this information into the strings you need.